<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeTable"
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            style="color:lightgreen;"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" style="color:red;" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="issort" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="danger" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="isoperation">
          <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
          <el-button type="danger" size="mini" icon="el-icon-delete">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[2, 5, 10, 20]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <el-dialog title="添加分类" :visible.sync="addCateDialogVisible" width="50%"
      @close="addCateDialogClose">
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级菜单" prop="cat_name">
          <el-cascader
            clearable
            v-model="selectKeys"
            :options="parentCateList"
            expand-trigger="hover"
            :props="caseCateList"
            change-on-select
            @change="parentCateChanged"
            remove-tag
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      addCateDialogVisible: false,
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 20,
      },
      //数据列表
      cateList: [],
      //总页数
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name',
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok',
        },
        {
          label: '排序',
          type: 'template',
          template: 'issort',
        },
        {
          label: '操作',
          type: 'template',
          template: 'isoperation',
        },
      ],
      addCateForm: {
        cat_name: '',
        //父级分类
        cat_pid: 0,
        //分类的等级，默认是1级
        cat_level: 0,
      },
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ],
      },
      parentCateList: [],
      caseCateList: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
      },
      selectKeys: [],
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.querInfo,
      })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.cateList = res.data.result
      this.total = res.data.total
      console.log('catelist', JSON.stringify(this.cateList))
      console.log('total', this.total)
    },
    handleSizeChange(newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    //添加分类
    showAddCateDialog() {
      this.getparentCateList()
      this.addCateDialogVisible = true
    },
    async getparentCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: { type: 2 },
      })
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      console.log('getparentCateList', JSON.stringify(res.data))
      this.parentCateList = res.data
    },
    //选择项发生变化触发这个事件
    parentCateChanged() {
      console.log('selectKeys:' + this.selectKeys)

      if (this.selectKeys.length > 0) {
        //当前父级的id
        this.addCateForm.cat_pid = this.selectKeys[this.selectKeys.length - 1]
        //当前父级的等级赋值
        this.addCateForm.cat_level = this.selectKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
     addCate() {
      console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid =>{
        if(!valid) return
        const {data :res}= await this.$http.post("categories",this.addCateForm)
        if(res.meta.status !==201){
          return this.$message.error(res.meta.msg)
        }

      this.$message.success(res.meta.msg)
      this.getCateList()
      this.addCateDialogVisible=false

      })
    },
    addCateDialogClose(){
        this.$refs.addCateFormRef.resetFields()
        this.addCateForm.cat_level=0
        this.addCateForm.cat_level=0
        this.selectKeys=[]
    }
  },
  created() {
    this.getCateList()
  },
}
</script>
<style lang="less" scoped>
.treeTable {
  margin-top: 10px;
}
.el-cascader {
  width: 100%;
}
</style>
